:root {
    --bg: #f8fafc;
    --bg-card: #ffffff;
    --fg: #1f2937;
    --muted: #6b7280;
    --accent: #C40010;
    --accent-dim: #C4001033;
    --border: #e5e7eb;
    --danger: #ef4444;
    --warning: #f59e0b;
}

#nes {
    width: 100%;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    border-radius: 8px;
    margin: 0 auto;
    display: block;
    position: relative;
    overflow: hidden;
}

#nes-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* CRT 弯曲效果 */
.crt-curve {
    border-radius: 8px;
    box-shadow: 
        inset 0 0 60px rgba(0, 0, 0, 0.4),
        0 0 40px rgba(0, 212, 170, 0.15),
        0 4px 20px rgba(0, 0, 0, 0.5);
}

/* 扫描线效果 */
.scanlines::after {
    content: '';
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 0, 0, 0.15) 2px,
        rgba(0, 0, 0, 0.15) 4px
    );
    pointer-events: none;
    z-index: 10;
}

/* 屏幕发光 */
.screen-glow {
    animation: screenGlow 3s ease-in-out infinite;
}

@keyframes screenGlow {
    0%, 100% { filter: brightness(1); }
    50% { filter: brightness(1.05); }
}

/* 状态指示器 */
.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.basic-controls {
    background: var(--bg-card);
    color: var(--fg);
    padding: 1rem;
    border-radius: 0.75rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border);
}

.rom-list {
    background: var(--bg-card);
    color: var(--fg);
    padding: 0.75rem;
    border-radius: 1rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border);
    width: 100%;
}

.rom-list h3 {
    margin-top: 0;
    border-bottom: 2px solid var(--accent-dim);
    padding-bottom: 0.5rem;
    margin-bottom: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--fg);
}

.rom-select {
    width: 100%;
    padding: 12px 16px;
    background: #ffffff;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    cursor: pointer;
    color: #0f172a;
    font-size: 14px;
    outline: none;
    transition: all 0.2s;
    font-weight: 500;
}

.rom-select:focus {
    border-color: #3b82f6;
    background: #eff6ff;
    box-shadow: 0 0 0 3px rgba(59, 132, 246, 0.1);
}

.btn {
    background-color: #165DFF;
    color: white;
    font-weight: 600;
    padding: 0.625rem 1.25rem;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(22, 93, 255, 0.2);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
    font-size: 14px;
}

.btn:hover {
    background-color: #144ECC;
    box-shadow: 0 6px 12px rgba(22, 93, 255, 0.3);
    transform: translateY(-1px);
}

.btn-primary {
    background: linear-gradient(135deg, #C40010 0%, #A0000D 100%);
    color: white;
    font-weight: 600;
    padding: 0.625rem 1.25rem;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(196, 0, 16, 0.2);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    border: none;
    font-size: 14px;
}

.btn-primary:hover {
    box-shadow: 0 6px 12px rgba(196, 0, 16, 0.3);
    transform: translateY(-1px);
}

.key-config {
    background: var(--bg-card);
    color: var(--fg);
    padding: 1rem;
    border-radius: 1rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border);
    min-width: 280px;
    font-size: 14px;
}

.key-config h3 {
    margin-top: 0;
    border-bottom: 2px solid var(--accent-dim);
    padding-bottom: 0.5rem;
    margin-bottom: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
}

.key-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 6px 0;
    padding: 6px 10px;
    background: #f8fafc;
    border-radius: 6px;
    transition: background 0.2s;
}

.key-item:hover {
    background: #f1f5f9;
}

.key-btn {
    width: 100px;
    padding: 10px;
    background: #ffffff;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    color: #111827;
    font-weight: 500;
    font-size: 13px;
    transition: all 0.2s;
}

.key-btn:hover {
    border-color: #C40010;
    background: #fef0f0;
}

.key-btn.pressing {
    background: #fce4e4;
    border-color: #C40010;
    color: #8b0008;
    box-shadow: 0 0 0 3px rgba(196, 0, 16, 0.2);
}

input[type="number"] {
    width: 70px;
    padding: 8px 12px;
    background: #ffffff;
    border: 2px solid #e5e7eb;
    border-radius: 6px;
    color: #111827;
    outline: none;
    transition: border-color 0.2s;
    text-align: center;
    font-weight: 500;
}

input[type="number"]:focus {
    border-color: #3b82f6;
}

.player-label {
    color: #C40010;
    font-weight: 600;
}

.player2-label {
    color: #A0000D;
    font-weight: 600;
}

.repeat-key-label {
    color: #8b5cf6;
    font-weight: 600;
}

.emulator-container {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    border: 1px solid #e5e7eb;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.game-info-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 512px;
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    background: #f8fafc;
    border-radius: 0.5rem;
    border: 1px solid #e5e7eb;
}

.game-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #6b7280;
    font-size: 14px;
}

.fps-counter {
    color: #C40010;
    font-size: 14px;
    font-weight: 600;
}

.section-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--fg);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-title i {
    color: #C40010;
}

.control-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid #e5e7eb;
}

.key-config-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

@media (max-width: 768px) {
    .key-config-grid {
        grid-template-columns: 1fr;
    }
}

.key-config-grid.hidden {
    display: none;
}

.settings-toggle-btn {
    background: linear-gradient(135deg, #C40010 0%, #A0000D 100%);
    color: white;
    font-weight: 600;
    padding: 0.625rem 1.25rem;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(196, 0, 16, 0.2);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
    font-size: 14px;
    font-family: "华文苹方", PingFang, "微软雅黑", "Source Code Pro", Tahoma, "Helvetica Neue", Helvetica, "Hiragino Sans GB", "Microsoft YaHei Light", "Microsoft YaHei", "Source Han Sans CN", "WenQuanYi Micro Hei", Arial, sans-serif;
}

.settings-toggle-btn:hover {
    box-shadow: 0 6px 12px rgba(196, 0, 16, 0.3);
    transform: translateY(-1px);
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-card);
    border-radius: 1rem;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border);
    max-width: 900px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    transform: scale(0.95) translateY(-20px);
    transition: all 0.3s ease;
    position: relative;
}

.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 2px solid #C4001033;
    background: var(--bg);
    border-radius: 1rem 1rem 0 0;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--fg);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-close-btn {
    background: #ef4444;
    color: white;
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    font-size: 18px;
}

.modal-close-btn:hover {
    background: #dc2626;
    transform: rotate(90deg);
}

.modal-body {
    padding: 1.5rem;
}

.repeat-settings-section {
    background: #f8fafc;
    border-radius: 0.75rem;
    padding: 1rem;
    margin-bottom: 1.5rem;
    border: 1px solid #e5e7eb;
}

.repeat-settings-section h4 {
    margin: 0 0 1rem 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--fg);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.repeat-settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

@media (max-width: 640px) {
    .repeat-settings-grid {
        grid-template-columns: 1fr;
    }
}

.repeat-setting-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: #ffffff;
    border-radius: 0.5rem;
    border: 1px solid #e5e7eb;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid #e5e7eb;
    background: #f8fafc;
    border-radius: 0 0 1rem 1rem;
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

.modal-save-btn {
    background: linear-gradient(135deg, #C40010 0%, #A0000D 100%);
    color: white;
    font-weight: 600;
    padding: 0.625rem 1.5rem;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-save-btn:hover {
    box-shadow: 0 6px 12px rgba(196, 0, 16, 0.3);
    transform: translateY(-1px);
}

.modal-cancel-btn {
    background: #f1f5f9;
    color: #475569;
    font-weight: 600;
    padding: 0.625rem 1.5rem;
    border-radius: 0.5rem;
    border: 1px solid #e2e8f0;
    cursor: pointer;
    transition: all 0.2s;
}

.modal-cancel-btn:hover {
    background: #e2e8f0;
}

.drop-zone {
    border: 2px dashed #cbd5e1;
    border-radius: 0.75rem;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s;
    background: #f8fafc;
    cursor: pointer;
    margin-bottom: 1rem;
}

.drop-zone:hover {
    border-color: #C40010;
    background: #fef0f0;
}

.drop-zone.drag-over {
    border-color: #C40010;
    background: #fce4e4;
    transform: scale(1.02);
}

.drop-zone i {
    font-size: 2rem;
    color: #C40010;
    margin-bottom: 0.5rem;
}

.drop-zone p {
    margin: 0;
    color: #64748b;
    font-size: 14px;
}

.drop-zone .highlight {
    color: #C40010;
    font-weight: 600;
}

.local-rom-info {
    background: #fef0f0;
    border: 1px solid #f5c0c0;
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    margin-top: 0.75rem;
    display: none;
}

.local-rom-info.show {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.local-rom-info .rom-name {
    color: #8b0008;
    font-weight: 500;
    font-size: 14px;
}

.local-rom-info .remove-btn {
    background: #ef4444;
    color: white;
    border: none;
    padding: 4px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s;
}

.local-rom-info .remove-btn:hover {
    background: #dc2626;
}